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- W4297567697 abstract "Investigations of the human connectome have elucidated core features of adult structural networks, particularly the crucial role of hub-regions. However, little is known regarding network organisation of the healthy elderly connectome, a crucial prelude to the systematic study of neurodegenerative disorders. Here, whole-brain probabilistic tractography was performed on high-angular diffusion-weighted images acquired from 115 healthy elderly subjects, whom were 76 to 94 years old. Structural networks were reconstructed between 512 cortical and subcortical brain regions. We sought to investigate the architectural features of hub-regions, as well as left-right asymmetries, and sexual dimorphisms. We observed that the topology of hub-regions is consistent with adult connectomic data, and more importantly, their architectural features reflect their ongoing vital role in network communication. We also found substantial sexual dimorphisms, with females exhibiting stronger inter-hemispheric connections between cingulate and prefrontal cortices. Lastly, we demonstrate intriguing left-lateralized subnetworks consistent with the neural circuitry specialised for language and executive functions, while rightward subnetworks were dominant in visual and visuospatial streams. These findings provide insights into healthy brain ageing and provide a benchmark for the study of neurodegenerative disorders such as Alzheimers disease and Frontotemporal Dementia." @default.
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- W4297567697 date "2015-02-19" @default.
- W4297567697 modified "2023-10-18" @default.
- W4297567697 title "The Organisation of the Elderly Connectome" @default.
- W4297567697 doi "https://doi.org/10.48550/arxiv.1502.05772" @default.
- W4297567697 hasPublicationYear "2015" @default.
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